// nombre de sous-menus
var nbsmenu = 8;

function voirMenu(menu)
{
  vitesseIE=60;
  vitesseFF=60;
  EcrireCookie(menu,"1");
  if(document.getElementById) 
  {
    var cur=document.getElementById(menu);
    cur.style.display="block";
    if(document.all)
    {
      cur.filters.alpha.opacity += 10;
      if (cur.filters.alpha.opacity>=100)
        return;
      else
        setTimeout("voirMenu('"+menu+"')",vitesseIE);
    }
    else
    {
      i=parseFloat(cur.style.getPropertyValue("-moz-opacity"));
      i+=parseFloat(0.1);
      cur.style.setProperty("-moz-opacity", i, "");
      if (i>=1)
        return;
      else
        setTimeout("voirMenu('"+menu+"')",vitesseFF);
    }
  }
}

function effacerMenu(menu)
{
  if(document.getElementById) 
  {
    cur=document.getElementById(menu);
    if(document.all)
    {
      cur.filters.alpha.opacity = 0;
    }
    else
    {
      cur.style.setProperty("-moz-opacity", 0, "");
    }
    cur.style.display = "none";
  }
}  

function initMenu()
{
  // pour tous les menus
  for(i=1;i<=nbsmenu;i++)
  {
    effacerMenu("menu"+i);
  }
  menu = LireCookie("menu");
  if(menu) afficherMenu(menu);
}

function afficherMenu(menu)
{
  if(document.getElementById(menu).style.display=="none")
  {
    voirMenu(menu);
  }
  else
  {
    effacerMenu(menu);
  }
}

function choisirMenu(menu)
{
  EcrireCookie("menu",menu,null,"/",null,false);
}

function EcrireCookie(nom, valeur)
{
  var argv=EcrireCookie.arguments;
  var argc=EcrireCookie.arguments.length;
  var expires=(argc > 2) ? argv[2] : null;
  var path=(argc > 3) ? argv[3] : null;
  var domain=(argc > 4) ? argv[4] : null;
  var secure=(argc > 5) ? argv[5] : false;
  document.cookie=nom+"="+escape(valeur)+
  ((expires==null) ? "" : ("; expires="+expires.toGMTString()))+
  ((path==null) ? "" : ("; path="+path))+
  ((domain==null) ? "" : ("; domain="+domain))+
  ((secure==true) ? "; secure" : "");
}

function getCookieVal(offset)
{
  var endstr=document.cookie.indexOf (";", offset);
  if (endstr==-1) endstr=document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function LireCookie(nom)
{
  var arg=nom+"=";
  var alen=arg.length;
  var clen=document.cookie.length;
  var i=0;
  while (i<clen)
  {
    var j=i+alen;
    if (document.cookie.substring(i, j)==arg) return getCookieVal(j);
    i=document.cookie.indexOf(" ",i)+1;
    if (i==0) break;
  }
  return null;
}